Noun
A believer in the doctrine of William Miller (d. 1849), who taught that the end of the world and the second coming of Christ were at hand.
A sulphide of nickel, commonly occurring in delicate capillary crystals, also in incrustations of a bronze yellow; -- sometimes called hair pyrites.
Source: Webster's dictionaryAlbany Conference (1845) The Albany Conference in 1845, attended by 61 delegates, was called to attempt to determine the future course and meaning of the Millerite movement. Source: Internet